Question

The biological catalyst present in living cells is called _______

• A. Hormone
• B. Enzyme
• C. Vitamin
• D. Mineral

Hint:

Enzymes are biological catalysts that speed up biochemical reactions in living cells.

Answer 1

The Correct Option is B

Concept:
A catalyst is a substance that increases the rate of a chemical reaction without being consumed in the reaction.

Step 1: Biological catalyst.
In living organisms, biochemical reactions occur continuously. These reactions are catalyzed by enzymes.

Step 2: Function of enzymes.
Enzymes lower activation energy and speed up reactions.

Step 3: Nature of enzymes.
Most enzymes are proteins, although some RNA molecules also show catalytic activity.

Step 4: Checking other options.
Hormones act as chemical messengers.
Vitamins act as nutrients or coenzymes.
Minerals act as electrolytes or cofactors.
Enzymes act as biological catalysts.

Step 5: Final answer.
Therefore, the biological catalyst present in living cells is called an enzyme. \[ \boxed{\text{Enzyme}} \]